2020.7.20

学习内容：

 1、综合实例

写一个Person 类，里面有姓名和年龄属性，写一个Service类，创建两个Person类实例对象，并打印Person 对象的姓名和年龄

package com.wuzy.entity;
public class Person {
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name=name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age=age;
    }
}


package com.wuzy.service;
import com.wuzy.entity.Person;
public class Service{
    public static void main(String[] args) {
        Person p =new Person();
        p.setName("张无忌");
        p.setAge(20);
        Person p2 = new Person();
        p2.setName("伍正云");
        p2.setAge(30);
        Person[]ps= {p,p2};
        for(int i=0;i<ps.length;i++) {
            System.out.println(ps[i].getName()+","+ps[i].getAge());
            }
        }
    }

2、读者借阅信息类

（1）假设在图书管理系统中有一个读者借阅信息类，它包括以下内容：

属性：书名、作者、出版社、借书时间、还书时间、应还时间、超期天数、罚款金额等

方法:设置书名、设置作者、设置出版社、获取书名、获取出版社等信息

试写一段Java代码，声明并定义该类

package day01;
public class Reader {
    private String name;
    private String writer;
    private String chubanshe;
    private String jietime;
    private String huantime;
    private String yinghuantime;
    private int chaoqitime;
    private int money;
    public void setName(String name) {
    this.name=name;
    }
    public void setWriter(String writer) {
    this.writer=writer;
    }
    public void setChubanshe(String chubanshe) {
    this.chubanshe=chubanshe;
    }
    public void setJietime(String jietime) {
    this.jietime=jietime;
    }
    public void setHuantime(String huantime) {
        this.huantime=huantime;
        }
    
    public void setYinghuantime(String yinghuantime) {
        this.yinghuantime=yinghuantime;
    }
    public void setChaoqitime(int chaoqitime) {
        this.chaoqitime=chaoqitime;
    }
    public void setMoney(int money) {
        this.money=money;
    }
    public String getName() {
        return name;
    }
    public String getWriter() {
        return writer;
    }
    public String getChubanshe() {
        return chubanshe;
    }    
    public String getJietime() {
        return jietime;
    }
    public String getHuantime() {
        return huantime;
    }
    public String getYinghuantime(){
        return yinghuantime;
    }
    public int getChaoqitime(){
        return chaoqitime;
    }
    public int getMoney()
    {
        return money;
    }
}

（2）在（1）的基础上创建读者借阅信息类的两个不同对象，并输出每个对象的基本信息

package day01;
public class Reader {
    private String name;
    private String writer;
    private String chubanshe;
    private String jietime;
    private String huantime;
    private String yinghuantime;
    private int chaoqitime;
    private int money;
    public void setName(String name) {
    this.name=name;
    }
    public void setWriter(String writer) {
    this.writer=writer;
    }
    public void setChubanshe(String chubanshe) {
    this.chubanshe=chubanshe;
    }
    public void setJietime(String jietime) {
    this.jietime=jietime;
    }
    public void setHuantime(String huantime) {
        this.huantime=huantime;
        }
    public void setYinghuantime(String yinghuantime) {
        this.yinghuantime=yinghuantime;
    }
    public void setChaoqitime(int chaoqitime) {
        this.chaoqitime=chaoqitime;
    }
    public void setMoney(int money) {
        this.money=money;
    }
    public String getName() {
        return name;
    }
    public String getWriter() {
        return writer;
    }
    public String getChubanshe() {
        return chubanshe;
    }
    public String getJietime() {
        return jietime;
    }
    public String getHuantime() {
        return huantime;
    }
    public String getYinghuantime(){
        return yinghuantime;
    }
    public int getChaoqitime(){
        return chaoqitime;
    }
    public int getMoney(){
        return money;
    }
    public static void main(String[] args) {
        //变量一
        Reader p1 = new Reader();
        p1.setName("《海底两万里》");
        p1.setWriter("凡尔纳");
        p1.setChubanshe("北京出版社");
        p1.setJietime("20200821");
        p1.setHuantime("20200902");
        p1.setYinghuantime("20200831");
        p1.setChaoqitime(3);
        p1.setMoney(50);
        //变量二
        Reader p2 = new Reader();
        p2.setName("《红楼梦》");
        p2.setWriter("曹雪芹");
        p2.setChubanshe("上海出版社");
        p2.setJietime("20200705");
        p2.setHuantime("20200716");
        p2.setYinghuantime("20200714");
        p2.setChaoqitime(2);
        p2.setMoney(30);
        //打印
        Reader[]ps= {p1,p2};
        for(int i=0;i<ps.length;i++) {
            System.out.println("书名:"+ps[i].getName()+
                               ",作者:"+ps[i].getWriter()+
                               ",出版社:"+ps[i].getChubanshe()+
                               ",借书时间:"+ps[i].getJietime()+
                               ",还书时间:"+ps[i].getHuantime()+
                               ",应还时间:"+ps[i].yinghuantime+
                               ",超期天数:"+ps[i].getChaoqitime()+
                               ",罚款金额:"+ps[i].getMoney()
                              );
            }
        }      
}

（3）在（2）的基础上添加读者借阅信息类的构造函数，重新创建该类的对象，并输出对象的基本信息

遇到的问题：

 上机练习（3）不明白什么意思

明天要学习的内容：

object类及其方法、对象中的克隆